1. Department of Urology, Sahlgrenska University Hospital, Göteborg, Sweden;
2. Department of Urology, Herlev University Hospital, Herlev, Denmark;
3. Department of Urogynecology, San Carlo Hospital, Rome, Italy;
4. Department of Urology, Hospital de Sao Joao, Porto, Portugal;
5. Faculty of Medicine, University of Porto, Porto, Portugal;
6. The Arthur Smith Institute for Urology, Pelvic Pain Treatmemt Center, Garden City, NY, USA;
7. Department of Urology, Stanford University School of Medicine, Stanford, CA, USA;
8. Department of Urology, Karolinska Institute, Stockholm, Sweden;
9. Department of Urology, Institute of Clinical Sciences, Gothenburg, Sweden;
10. International Painful Bladder Foundation, Narden, The Netherlands;
11. Zucker School of Medicine at Hofstra-Northwell, The Arthur Smith Institute for Urology, Lake Success, NY, USA;
12. Italian Interstititial Cystitis Ass, Rome, Italy;
13. University of Antwerp, Antwerpen, Belgium;
14. Department of Urology, Helsinki University Central Hospital, Helsinki, Finland;
15. Department of Urology Andrology and Robotic Surgery, Indraprastha Apollo Hospital, New Delhi, India;
16. Department of Urology, Tokyo Women’s Medical University Medical Center East Tokyo, Japan, Tokyo, Japan;
17. Ueda Clinic, Kyoto, Japan;
18. Department of Urology, Odense University Hospital, Odense, Denmark;
19. Faculty of Medicine and Health Sciences, University of Antwerp, Wilrijk, Belgium;
20. Department of Urology, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow, Russian Federation